Can anyone identify these switches please

Either way the Grid plates Mk and you will need Mk Normal rocker switches as only them will fit, though you can also get push on/off switch modules that look like dimmers that also fit, using adapters to fit Mk.

Im intriqued why your removing them

Looks like they are MK

333rocky333 said:

Im intriqued why your removing them

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We're replacing 12V halogens with non-dimmable 12V LEDs and I don't think these would work would they ?

Am I correct reading that these are rated to 220 W ? So having 7x50W halogens on one switch is overloading them ?

If you dont mind them as on/off then good idea as dimming 12 volt leds can be problematic.
Though be aware before spending too much on lamps, that you still may encounter problems with compatibility between the Led lamps and your existing Transformers.
This can be a major issue with flickering and instability and most tend to only resolve it by converting to 240volt lamps or my preference 240v replacement fittings

I see the dimmers were MK then
Good ones too, designed for Transformers

https://www.screwfix.com/p/mk-1-gang-dimmer-switch-low-voltage-220w-white/63302